EP2483274B1 - Antimalaria-mittel als hemmer der dihydroorotat-dehydrogenase - Google Patents
Antimalaria-mittel als hemmer der dihydroorotat-dehydrogenase Download PDFInfo
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- EP2483274B1 EP2483274B1 EP10821105.3A EP10821105A EP2483274B1 EP 2483274 B1 EP2483274 B1 EP 2483274B1 EP 10821105 A EP10821105 A EP 10821105A EP 2483274 B1 EP2483274 B1 EP 2483274B1
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- SNTNVQYCKZKZOP-UHFFFAOYSA-N CCOc1n[n]2c(Nc3ccc(C(F)(F)F)cc3)cc(C)nc2n1 Chemical compound CCOc1n[n]2c(Nc3ccc(C(F)(F)F)cc3)cc(C)nc2n1 SNTNVQYCKZKZOP-UHFFFAOYSA-N 0.000 description 1
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- YAMWBAXNSZZKOJ-UHFFFAOYSA-N Cc1nc2ncn[n]2c(NC(Cc2c3)Cc2cc(F)c3F)c1 Chemical compound Cc1nc2ncn[n]2c(NC(Cc2c3)Cc2cc(F)c3F)c1 YAMWBAXNSZZKOJ-UHFFFAOYSA-N 0.000 description 1
- KHDQRISTRZOHRU-UHFFFAOYSA-N Cc1nc2ncn[n]2c(NC2Cc3cc(F)ccc3C2)c1 Chemical compound Cc1nc2ncn[n]2c(NC2Cc3cc(F)ccc3C2)c1 KHDQRISTRZOHRU-UHFFFAOYSA-N 0.000 description 1
- OIKAFCNSMKUYRB-UHFFFAOYSA-N Cc1nc2ncn[n]2c(Nc2cc(C(F)(F)F)c(C(F)(F)F)cc2)c1 Chemical compound Cc1nc2ncn[n]2c(Nc2cc(C(F)(F)F)c(C(F)(F)F)cc2)c1 OIKAFCNSMKUYRB-UHFFFAOYSA-N 0.000 description 1
- XBIVLGNMWGHHLL-UHFFFAOYSA-N Cc1nc2ncn[n]2c(Nc2ccc(CC(F)(F)F)cc2)c1 Chemical compound Cc1nc2ncn[n]2c(Nc2ccc(CC(F)(F)F)cc2)c1 XBIVLGNMWGHHLL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
- C07D487/04—Ortho-condensed systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P33/00—Antiparasitic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P33/00—Antiparasitic agents
- A61P33/02—Antiprotozoals, e.g. for leishmaniasis, trichomoniasis, toxoplasmosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P33/00—Antiparasitic agents
- A61P33/02—Antiprotozoals, e.g. for leishmaniasis, trichomoniasis, toxoplasmosis
- A61P33/06—Antimalarials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
Definitions
- the present invention relates to novel anti-malarial agents and inhibitors of dihydroorotate dehydrogenase.
- Malaria is a disease that is prevalent in many developing countries. Nearly 40% of the world's population is at risk for contracting this disease, which has been a major cause of mortality throughout history. In the United States travelers to these endemic regions are at risk for contracting the disease. The widespread emergence of drug resistance in many tropical countries has compromised many of the current chemotherapies and there is a continued need for new chemotherapeutic approaches.
- Malaria is a disease caused by a parasite transmitted by the bite of an infected female Anopheles mosquito. When an infecting sporozoite parasite enters the bloodstream it rapidly infects both liver and red blood cells and differentiates into merozoites. Asexual reproduction of the merozoite within erythrocytes results in the rupture and subsequent reinfection of other red blood cells. This cyclic process results in clinical symptoms, which include headaches, sweating, vomiting, malaise, delirium and acute fever and may be fatal if not treated. Malaria in humans is caused by 4 species of parasitic protozoa belonging to the genus Plasmodium. Of these, P. falciparum is the most deadly and the greatest threat to travelers abroad while P. malariae, P. vivax and P. ovale, though infrequently fatal in healthy adults, can cause morbidity in the endemic areas.
- Various medications are presently used for the treatment of malaria. However, many of these medications are costly and some exhibit significant toxicity and undesirable side effects in humans.
- the most common drug for treating malaria is chloroquine.
- Other drugs include quinine, melfloquine, atovaquone/proguanil, doxycycline, artesunate, hydroxychloroquine, halofantrine, pyrimethamine-sulfadoxine, and primaquine. Drug choice often depends on one of the four types of malaria parasites.
- Malaria parasites rely on de novo pyrimidine biosynthesis to provide precursors for DNA and RNA synthesis, hence for proliferation.
- the parasite does not have pyrimidine nucleoside or base salvage pathways, thus the enzymes in the de novo pathway are essential to parasite survival.
- mammalian cells have salvage pathways that provide an alternative route to these essential metabolites.
- DHODH Dihydroorotate dehydrogenase
- this invention provides novel potent anti-malarial agents and methodology of treating malaria using novel potent anti-malarial agents.
- the invention also provides potent anti-malarial agents that are selective inhibitors of P. falciparum dihydroorotate dehydrogenase and active against chloroquine-sensitive and resistant malarial strains.
- the present invention relates to novel compounds for inhibiting the activity of Plasmodum falciparum dihydroorotate dehydrogenase.
- the compounds display selective inhibition of Plasmodium falciparum dihydroorotate dehydrogenase over human dihydroorotate dehydrogenase.
- the present invention also relates to the use of those compounds methods for preventing or treating diseases associated with the action of Plasmodium falciparum dihydroorotate dehydrogenase, such as malaria.
- the invention also encompasses pharmaceutically acceptable salts, solvates, stereoisomers, tautomers, of such compounds.
- composition that comprises a compound that is selected from the following table: and stereoisomers, tautomers, solvates and pharmaceutically acceptable salts of these compounds and a pharmaceutically acceptable carrier.
- the invention provides a pharmaceutical composition of a compound as defined herein, or a pharmaceutically acceptable salt, solvate, stereoisomer, tautomer thereof in a pharmaceutically acceptable carrier.
- compounds of the present invention can have asymmetric centers they can occur, except when specifically noted, as mixtures of enantiomers, diastereoisomers or as individual diastereomers and enantiomers, with all isomeric forms being contemplated by the present invention.
- the present invention also encompasses racemic mixtures.
- Compounds of the present invention embrace all conformational isomers, including, for example, cis- and trans- conformations.
- the separation of diasteroisomers or enantiomers can be achieved by known analytical methods, such as chiral chromatography, crystallization, or through the employment of optically active resolving agents.
- stereoisomer means one stereoisomer of a compound that is substantially free of other stereoisomers of that compound.
- a stereomerically pure compound having one chiral center will be substantially free of the opposite enantiomer of the compound.
- a stereomerically pure compound having two chiral centers will be substantially free of other diastereomers of the compound.
- a typical stereomerically pure compound comprises greater than about 80% by weight of one stereoisomer of the compound and less than about 20% by weight of other stereoisomers of the compound, for example greater than about 90% by weight of one stereoisomer of the compound and less than about 10% by weight of the other stereoisomers of the compound, or greater than about 95% by weight of one stereoisomer of the compound and less than about 5% by weight of the other stereoisomers of the compound, or greater than about 97% by weight of one stereoisomer of the compound and less than about 3% by weight of the other stereoisomers of the compound.
- the depicted structure controls. Additionally, if the stereochemistry of a structure or a portion of a structure is not indicated with, for example, bold or dashed lines, the structure or portion of the structure is to be interpreted as encompassing all stereoisomers of it.
- the term "pharmaceutically acceptable salt” is a pharmaceutically acceptable, organic or inorganic acid or base salt of a compound of the invention.
- Representative pharmaceutically acceptable salts include, e . g ., alkali metal salts, alkali earth salts, ammonium salts, water-soluble and water-insoluble salts, such as the acetate, amsonate (4,4-diaminostilbene-2, 2 -disulfonate), benzenesulfonate, benzonate, bicarbonate, bisulfate, bitartrate, borate, bromide, butyrate, calcium, calcium edetate, camsylate, carbonate, chloride, citrate, clavulariate, dihydrochloride, edetate, edisylate, estolate, esylate, fiunarate, gluceptate, gluconate, glutamate, glycollylarsanilate, hexafluorophosphate, hexy
- treat refers to the amelioration or eradication of a disease or symptoms associated with a disease. In certain embodiments, such terms refer to minimizing the spread or worsening of the disease resulting from the administration of one or more prophylactic or therapeutic agents to a patient with such a disease.
- prevent refers to the prevention of the onset, recurrence, or spread of the disease in a patient resulting from the administration of a prophylactic or therapeutic agent.
- a therapeutically effective amount with respect to a compound of the invention means that amount of therapeutic agent alone, or in combination with other therapies, that provides a therapeutic benefit in the treatment or prevention of a disease.
- the term can encompass an amount that improves overall therapy, reduces or avoids symptoms or causes of disease, or enhances the therapeutic efficacy of or synergies with another therapeutic agent.
- modulate refers to the ability of a compound to increase or decrease the function, or activity of, for example, DHODH.
- Module in its various forms, is intended to encompass inhibition, antagonism, partial antagonism, activation, agonism and/or partial agonism of the activity associated with DHODH.
- DHODH inhibitors are compounds that, e.g., bind to, partially or totally block stimulation, decrease, prevent, delay activation, inactivate, desensitize, or down regulate signal transduction.
- DHODH activators are compounds that, e.g., bind to, stimulate, increase, open, activate, facilitate, enhance activation, sensitize or up regulate signal transduction. The ability of a compound to modulate DHODH can be demonstrated in an enzymatic assay or a cell-based assay.
- a "patient” includes an animal (e.g., cow, horse, sheep, pig, chicken, turkey, quail, cat, dog, mouse, rat, rabbit or guinea pig), in one embodiment a mammal such as a non-primate and a primate (e.g., monkey and human), and in another embodiment a human.
- a patient is a human.
- the patient is a human infant, child, adolescent or adult.
- the present invention provides small molecule therapeutics that are potent inhibitors of the pyrimidine salvage enzyme DHOD.
- Compounds in accordance with this invention are shown in Table 1 below.
- the DHOD inhibitors are based upon an imidazo[1,2 a ]pyrimidin-5-yl scaffold.
- Illustrative compounds of this embodiment are shown in Table 2 below.
- the invention provides a pharmaceutical composition comprising a compound selected from Table 4 or a salt, solvate, stereoisomer, tautomer thereof, and a pharmaceutically acceptable carrier.
- compositions of the compounds or their pharmaceutically acceptable salts further comprise a pharmaceutically acceptable carrier material.
- a pharmaceutically acceptable carrier material can be utilized.
- the carrier material can be an organic or inorganic inert carrier material, for example, one that is suitable for oral administration.
- Suitable carriers include water, gelatin, gum arabic, lactose, starch, magnesium stearate, talc, vegetable oils, polyalkylene-glycols, petroleum jelly and the like.
- the pharmaceutical preparations may also contain other pharmaceutically active agents. Additional additives such as flavoring agents, preservatives, stabilizers, emulsifying agents, buffers and the like may be added in accordance with accepted practices of pharmaceutical compounding.
- the pharmaceutical preparations can be made up in any conventional form including a solid form for oral administration such as tablets, capsules, pills, powders, granules, and the like.
- the pharmaceutical preparations may be sterilized and/or may contain adjuvants such as preservatives, stabilizers, wetting agents, emulsifiers, salts for varying the osmotic pressure and/or buffers.
- the compounds of the invention can also be administered to a patient in accordance with the invention by topical (including transdermal, buccal or sublingual), or parenteral (including intraperitoneal, subcutaneous, intravenous, intradermal or intramuscular injection) routes.
- topical including transdermal, buccal or sublingual
- parenteral including intraperitoneal, subcutaneous, intravenous, intradermal or intramuscular injection
- the compounds are administered orally.
- An oral dosage form comprises tablets, capsules of hard or soft gelatin methylcellulose or of another suitable material easily dissolved in the digestive tract.
- the oral dosages contemplated in accordance with the present invention will vary in accordance with the needs of the individual patient as determined by the prescribing physician. For instance, a daily dosage of from about 1 mg to about 50 mg per kg of body weight, such as from about 5 mg to about 25 mg per kg of body weight of the patient may be utilized.
- the therapeutically active substance enumerated herein in any desired amount for enteral administration within an oral unit dosage form.
- Particularly suitable for enteral or oral administration are tablets, dragees or capsules having talc and/or carbohydrate carrier binder or the like, the carrier could be lactose and/or corn starch and/or potato starch.
- a syrup, elixir or the like can be used where a sweetened vehicle is employed.
- Sustained release compositions can also be formulated including those where the active component is protected with differentially degradable coatings, e.g., by microencapsulation, multiple coatings, etc.
- solutions typically oily or aqueous solutions as well as suspensions, emulsions, or implants, including suppositories.
- Therapeutic compounds will be formulated in sterile form in multiple or single dose formats such as being dispersed in a fluid carrier such as sterile physiological saline or 5% saline dextrose solutions commonly used with injectables.
- the compound(s) of the invention can be suitably admixed in a pharmacologically inert topical carrier such as a gel, an ointment, a lotion or a cream.
- topical carriers include water, glycerol, alcohol, propylene glycol, fatty alcohols, triglycerides, fatty acid esters, or mineral oils.
- Other possible topical carriers are liquid petrolatum, isopropylpalmitate, polyethylene glycol, ethanol 95%, polyoxyethylene monolauriate 5% in water, sodium lauryl sulfate 5% in water, and the like.
- materials such as anti-oxidants, humectants, viscosity stabilizers and the like also may be added if desired.
- inventive compounds and pharmaceutically acceptable compositions of the same are candidate therapeutics for treating parasite infections in humans, such as a P. falciparum infection that causes the disease malaria.
- the parasite is a member of the Plasmodium genus.
- the parasite is Plasmodium falciparum.
- This intermediate was synthesized by suspending Intermediate 2 in phosphorus oxychloride (ALDRICH, 21.98 ml, 236 mmol) was heating the mixture under reflux for 2 h, the starting material dissolved meanwhile. An aliquot of the reaction was partitioned between NaCO 3 10% aq.(1 mL) and DCM (1 mL) and the organic phase was checked by TLC (Hexane/AcOEt 6/4) showing the reaction was complete. The reaction mixture was slowly added to a mixture of water and ice. The solution was neutralized with 10% aq. Na 2 CO 3 (800 mL approx.) and product was extracted with DCM (250 mL).
- the titled compound (Intermediate 5), was obtained by refluxing a suspension of Intermediate 4 (0.3 g, 1.684 mmol) in phosphorus oxychloride (ALDRICH, 1.88 mL, 20.2 mmol) for 2 h and then, adding the reaction mixture slowly to a mixture of water and ice.
- the solution was neutralized with solid Na 2 CO 3 and extracted with DCM (25 mL).
- the aqueous layer was further extracted with DCM (2 x 5 mL) and the combined organic layers were washed with water (20 mL), then with brine (20 mL), and then dried over MgSO 4 .
- Solvent was removed under reduced pressure and the crude product was purified (silica gel column, eluting with Hexane/EtOAc mixtures from 100:0 to 40:60%) to obtain Intermediate 5 as a white solid.
- Example 7 Synthesis of 7-chloro-2-(1,1-difluoropropyl)-5-methyl[1,2,4]triazolo[1,5-a] pyrimidine (Intermediate 7).
- Example 8 Synthesis 7-chloro-5-methyl-2-(methylthio) [1,2,4]triazolo[1,5-a]pyrimidine (Intermediate 8).
- Example 10 Synthesis of 5-methyl-2-(methylsulfonyl)-N-[4-(pentafluoro- ⁇ 6 -sulfanyl)phenyl] [1,2,4]triazolo[1,5-a]pyrimidin-7-amine (Intermediate 10).
- Example 12 Synthesis of N-[3,5-difluoro-4-(trifluoromethyl)phenyl]-5-methyl-2-(methylsulfonyl) [1,2,4]triazolo[1,5-a]pyrimidin-7-amine (Intermediate 12).
- Example 14 Synthesis of N -[3-fluoro-4-(trifluoromethyl)phenyl]-5-methyl-2-(methylsulfonyl) [1,2,4]triazolo[1,5-a]pyrimidin-7-amine (Intermediate 14).
- Example 16 Synthesis of 5-methyl-2-(methylsulfonyl)-N-[4-(trifluoromethyl)phenyl][1,2,4] triazolo[1,5-a]pyrimidin-7-amine (Intermediate 16).
- Scheme I shows a representative method for synthesizing compounds that belong to the triazolopyrimidine class, particularly, the synthesis of 5-Methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)-(4-trifluoromethyl-phenyl)-amine.
- Step (A) To a well-stirred solution of 5-(trifluoromethyl)-4 H -1,2,4-triazol-3-amine (1 g, 6.58 mmol) in 15-20 mL glacial acetic acid, was added ethyl acetoacetate (2.57 g or 2.5 mL, 19.77 mmol) and the reaction mixture was refluxed for 6-6.5 h. Reaction progress was monitored by TLC. After completion, the reaction mixture was brought to room temperature and the excess glacial acetic acid was evaporated in vacuo. The light pinkish white solid, thus obtained, was filtered off, washed with dichloromethane and dried to yield 0.750 g (52.3 %) of the titled compound.
- Step (C) Synthesis of N -(4-chlorophenyl)-5-methyl-2-(trifluoromethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-amine:
- Example 23 Synthesis of N -(2,3-Dihydro-1 H -inden-2-yl)-5-methyl-[1,2,4]triazolo[1,5- a ]pyrimidin-7-amine.
- Example 24 Synthesis of 5-Methyl-N-(1,2,3,4-tetrahydronaphthalen-2-yl)-[1,2,4]triazolo[1,5- a ]pyrimidin-7-amine.
- Example 25 Synthesis of 5-Methyl- N -(4-(2,2,2-trifuoroethyl)phenyl)-[1,2,4]triazolo[1,5- a ]pyrimidin-7-amine.
- Example 26 Synthesis of N -(4-Chloro-3-fluorophenyl)-5-methyl-[1,2,4]triazolo[1,5- a ]pyrimidin-7-amine.
- Example 27 Synthesis of 5-Methyl- N -(4-(trifuoromethylthio)phenyl)-[1,2,4]triazolo[1,5- a ]pyrimidin-7-amine.
- Example 28 Synthesis of N -(5-Fluoro-2,3-dihydro-1 H -inden-2-yl)-5-methyl-[1,2,4]triazolo[1,5- a ]pyrimidin-7-amine.
- Example 29 Synthesis of N -(5,6-Dimethoxy-2,3-dihydro-1 H -inden-2-yl)-5-methyl-[1,2,4]triazolo[1,5- a ]pyrimidin-7-amine.
- Example 30 Synthesis of N -(5-Bromo-2,3-dihydro-1 H -inden-2-yl)-5-methyl-[1,2,4]triazolo[1,5- a ]pyrimidin-7-amine.
- Example 31 Synthesis of 2-ethyl-5-methyl-N-[4-(pentafluoro- ⁇ 6 -sulfanyl)phenyl][1,2,4]triazolo [1,5-a]pyrimidin-7-amine.
- Example 32 Synthesis of 2-(ethyloxy)-5-methyl-N-[4-(pentafluoro- ⁇ 6 -sulfanyl)phenyl][1,2,4] triazolo[1,5-a]pyrimidin-7-amine.
- Example 33 Synthesis of N -[3,5-difluoro-4-(trifluoromethyl)phenyl]-2-(ethyloxy)-5-methyl[1,2,4] triazolo[1,5- a ]pyrimidin-7-amine.
- Example 34 Synthesis of 2-(ethyloxy)-N-[3-fluoro-4-(trifluoromethyl)phenyl]-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine.
- Example 35 Synthesis of 2-(ethyloxy)-5-methyl-N-[4-(trifluoromethyl)phenyl] [1,2,4]triazolo[1,5-a]pyrimidin-7-amine.
- Example 36 Synthesis of 5-methyl-2-(1-methylethyl)-N-[4-(trifluoromethyl)phenyl][1,2,4] triazolo[1,5-a]pyrimidin-7-amine.
- Example 37 Synthesis of 5-methyl-2-(1-methylethyl)-N-[4-(pentafluoro- ⁇ 6 -sulfanyl)phenyl][1,2,4] triazolo[1,5-a]pyrimidin-7-amine.
- Example 39 Example 15: Synthesis of 2-cyclopropyl-5-methyl-N-[4-(pentafluoro- ⁇ 6 -sulfanyl)phenyl][1,2,4] triazolo[1,5-a]pyrimidin-7-amine.
- Example 44 Synthesis of 2-(1,1-difluoroethyl)-5-methyl-N-[4-(pentafluoro- ⁇ 6 -sulfanyl)phenyl] [1,2,4]triazolo[1,5-a]pyrimidin-7-amine.
- Example 45 Synthesis of 2-(1,1-difluoroethyl)-5-methyl-N-[4-(trifluoromethyl)phenyl][1,2,4] triazolo[1,5-a]pyrimidin-7-amine.
- Example 46 Synthesis of 2-(1,1-difluoroethyl)-N-[3-fluoro-4-(trifluoromethyl)phenyl]-5-methyl [1,2,4]triazolo[1,5-a]pyrimidin-7-amine.
- Example 47 Synthesis of 2-(1,1-difluoroethyl)-N-[3,5-difluoro-4-(trifluoromethyl)phenyl]-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine.
- Example 48 Synthesis of 2-(1,1-difluoropropyl)-5-methyl-N-[4-(trifluoromethyl)phenyl][1,2,4] triazolo[1,5-a]pyrimidin-7-amine.
- Example 49 Synthesis of 2-(1,1-difluoropropyl)-5-methyl-N-[4-(pentafluoro- ⁇ 6 -sulfanyl)phenyl] [1,2,4]triazolo[1,5-a]pyrimidin-7-amine.
- imidazopyrimidine compounds were achieved by reacting an appropriately substituted 2-aminoimidazole with ethyl acetoacetate, followed by chlorination and reaction of the resultant 5-chloro compound with an appropriate amine.
- An exemplary synthesis is given below for 7-methyl-N-(4-(trifluoromethyl)phenyl) imidazo[1,2-a]pyrimidin-5-amine.
- Example 50 Synthesis of 7-methyl-N-(4-(trifluoromethyl)phenyl)imidazo[1,2-a]pyrimidin-5-amine.
- Example 52 7-Methyl- N -(4-(pentafluorosulfur)phenyl)imidazo[1,2- a ]pyrimidin-5-amine:
- DHOD plays an important role in malaria. Described here are assays useful for testing the inhibition of DHOD by compounds of the present invention.
- the assay was carried out using a solution containing 100 mM HEPES, pH 8.0, 150 mM NaCl, 10% glycerol, 0.1% Triton X-100, 20 micro molar CoQ D (coenzyme Q D ), 200 micro molar L-dihydroorotate, and 120 micro molar DCIP. Reactions are initiated by addition of enzyme to a final concentration in the range of about 5 nM to about 50 nM while maintaining the temperature of a circulating water bath at 25° C.
- Assay solutions were prepared as discussed above, except that DCIP is not present and the solution is depleted of oxygen by the inclusion of an oxidase/reductase system, such as, 0.1 mg/ml of glucose oxidase, 0.02 mg/ml catalase and 50 mM glucose.
- the data obtained was fitted to equation 1, to determine the IC 50 values of the representative compounds.
- v i v o 1 + I I ⁇ C 50
- Table 5 shows the IC 50 and EC 50 values for an illustrative set of compounds against Plasmodiumfalciparum.
- Table 5 Structure IC50 pf DHOD ( ⁇ M) EC50 Pfalcipar um 3D7 ( ⁇ M) Structure IC50 pf DHOD ( ⁇ M) EC50 Pfalciparum 3D7 ( ⁇ M) 0.5 1.8 1.66 >10 0.077 0.33 3.17 >10 0.5 2.4 0.03 0.019 0.09 0.26 0.09 0.07 0.22 0.7 0.13 0.8 0.25 1.8 0.19 0.24 0.038 0.007 0.035 0.073 0.043 2.47 11.0 0.5 1.0 0.51 3.5 1.2 >5 1.0 1.5 0.14 0.6 0.61 >4.0 0.2 0.6 0.61 1.3 0.1 0.3 4.62 7.7 0.13 0.6 0.99 6.6 0.03 0.14 0.52 0.25 0.74 8.5 1.43 8.3 2.12 9.9 0.032 0.2 0.06 0.1 1.7 >10 0.63 2.5 0.67 10 0.54
- the compounds of the invention are potent inhibitors of the Plasmodium falciparum DHOD enzymes, with IC 50 values in the low to sub-micromolar range.
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Claims (15)
- Verbindung nach einem der Ansprüche 1 bis 5, wobei das pharmazeutisch unbedenkliche Salz aus Acetat, Amsonat (4,4-Diaminostilben-2,2-disulfonat), Benzensulfonat, Benzonat, Bicarbonat, Bisulfat, Bitartrat, Borat, Bromid, Butyrat, Calcium, Calciumedetat, Camsylat, Carbonat, Chlorid, Citrat, Clavulariat, Dihydrochlorid, Edetat, Edisylat, Estolat, Esylat, Fiunarat, Gluceptat, Gluconat, Glutamat, Glycollylarsanilat, Hexafluorphosphat, Hexylresorcinat, Hydrabamin, Hydrobromid, Hydrochlorid, Hydroxynaphthoat, Iodid, Isothionat, Lactat, Lactobionat, Laurat, Malat, Maleat, Mandelat, Mesylat, Methylbromid, Methylnitrat, Methylsulfat, Mucat, Napsylat, Nitrate, N-Methylglucaminammoniumsalz, 3-Hydroxy-2-naphthoat, Oleat, Oxalat, Palmitat, Pamoat (1,1-Methen-bis-2-hydroxy-3-naphthoat, Einbonat), Pantothenat, Phosphat/Diphosphat, Pikrat, Polygalacturonat, Propionat, p-Toluensulfonat, Salicylat, Stearat, Subacetat, Succinat, Sulfat, Sulfosaliculat, Suramat, Tannat, Tartrat, Teoclat, Tosylat, Triethiodid und Valeratsalzen ausgewählt ist.
- Pharmazeutische Zusammensetzung, umfassend eine Verbindung nach einem der Ansprüche 1 bis 6 und einen pharmazeutisch unbedenklichen Träger.
- Pharmazeutische Formulierung nach Anspruch 7, wobei die Formulierung eine orale Formulierung ist.
- Verbindung nach einem der Ansprüche 1 bis 6 zur Verwendung als ein Medikament.
- Verbindung nach einem der Ansprüche 1 bis 6 oder Formulierung nach einem der Ansprüche 6 bis 7 zur Verwendung bei der Verhütung oder Behandlung eines Leidens oder einer Krankheit, das/die mit Dihydroorotat-Dehydrogenase von Plasmodium verbunden ist.
- Verbindung nach einem der Ansprüche 1 bis 6 oder Formulierung nach einem der Ansprüche 7 bis 8 zur Verwendung bei der Verhütung oder Behandlung von Parasiteninfektion bei Menschen.
- Verbindung zur Verwendung nach Anspruch 11, wobei die Parasiteninfektion Malaria ist.
- Verbindung zur Verwendung nach Anspruch 11, wobei die Parasiteninfektion P. falciparum-Infektion ist.
- Verbindung zur Verwendung nach einem der Ansprüche 10 bis 13, wobei die Verbindung in einer täglichen Dosis von etwa 1 mg bis etwa 50 mg pro Kilo Körpergewicht verabreicht werden soll.
- Verbindung zur Verwendung nach Anspruch 14, wobei die Verbindung in einer täglichen Dosis von etwa 5 mg bis etwa 25 mg pro Kilo Körpergewicht verabreicht werden soll.
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PL10821105T PL2483274T3 (pl) | 2009-09-29 | 2010-09-28 | Środki przeciwmalaryczne hamujące dehydrogenazę dihydroorotanową |
MEP-2015-8A ME02020B (me) | 2009-09-29 | 2010-09-28 | Anti-malarijski agensi kao inhibitori dihidroorotat dehidrogenaze |
SI201030853T SI2483274T1 (sl) | 2009-09-29 | 2010-09-28 | Sredstva proti malariji, ki so inhibitorji dihidroorotat dehidrogenaze |
CY20151100022T CY1115915T1 (el) | 2009-09-29 | 2015-01-09 | Ανθελονοσιακοι παραγοντες που ειναι αναστολεις της διυδροοροτικης αφυδρογονασης |
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EP3072894A1 (de) | 2015-03-26 | 2016-09-28 | Board Of Regents Of the University Of Texas System | Neue substituierte triazolopyrimidine als mittel gegen malaria |
WO2018071282A1 (en) * | 2016-10-12 | 2018-04-19 | Merck Sharp & Dohme Corp. | Kdm5 inhibitors |
EP3548035A4 (de) | 2016-11-30 | 2020-07-22 | Case Western Reserve University | Kombinationen von 15-pgdh-inhibitoren mit corticosteroiden und/oder tnf-inhibitoren und verwendungen davon |
US11718589B2 (en) | 2017-02-06 | 2023-08-08 | Case Western Reserve University | Compositions and methods of modulating short-chain dehydrogenase |
US11426420B2 (en) | 2017-04-07 | 2022-08-30 | Case Western Reserve University | Inhibitors of short-chain dehydrogenase activity for treating coronary disorders |
EP3842100A1 (de) | 2019-12-24 | 2021-06-30 | The Board Of Regents Of The University Of Texas System | Mittel gegen malaria |
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US5478825A (en) | 1991-02-22 | 1995-12-26 | Egis Gyogyszergyar | 5-(substituted amino)-1,2,4-triazolo (1,5-A) pyrimidine derivatives |
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US20100056494A1 (en) * | 2007-01-26 | 2010-03-04 | Irm Llc | Purine compounds and compositions as kinase inhibitors for the treatment of plasmodium related diseases |
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BR112012007179A2 (pt) | 2017-07-25 |
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BR112012007179B1 (pt) | 2020-12-01 |
JP5818266B2 (ja) | 2015-11-18 |
EP2483274A2 (de) | 2012-08-08 |
SMT201500071B (it) | 2015-05-05 |
CN102741255A (zh) | 2012-10-17 |
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CA2775354A1 (en) | 2011-04-07 |
ME02020B (me) | 2015-05-20 |
PT2483274E (pt) | 2015-02-04 |
CN102741255B (zh) | 2015-10-07 |
BR112012007179A8 (pt) | 2018-01-23 |
WO2011041304A2 (en) | 2011-04-07 |
US9238653B2 (en) | 2016-01-19 |
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HRP20150066T1 (hr) | 2015-02-27 |
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